Civil War Cartridge Casing ID Help

[Riggleman]

Found today on property rumored to have a Union camp. Owner said an Ohio company camped there in the winter of 1863. Located here in WV. The casing was found near what we believe to be a picket post, where we also located 4 .58cal 3 ring minies, a .58cal roundball, horse shoes and camp lead. Appears to be a 44cal or 45cal. Any help on ID is appreciated. Thanks for looking.

 

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[mick56]

Could have been fired from a Henry rifle with the two firing pins. What is the inside diameter of the casing?
Maybe a 38-40.

 

[TheCannonballGuy]

It is a cartridge-casing for the .44 Henry Repeating Rifle... but the raised letters "US" headstamp on the casing's base means it was made sometime between 1885 and 1908 by the United States Cartridge Company. The US army sold off most of its Henry Repeaters as "war surplus" after the civil war ended, and being a 16-shot repeater the Henry became very popular with civilians for Indian-fighting and big-game hunting... which is why rimfire cartridges were still being made for it 20-40 years after the civil war ended.

 

[pistol-pete]

Might add.....With the double firing pin marks, It WAS fired in a Henry or 1866 Winchester. Seems everyone else used on one.